The Arnold Company

The Arnold Company is the number one manufacturer of Hopper Gate Openers in the United States. As home of the Door Demon® Hopper Gate Opener, we also offer custom designed Hopper Gate and Boxcar Openers to meet the specific needs of your working environment! We also carry a full line of Railcar and Industrial Vibrators. With safety and productivity always in mind, we take pride in our product selection, product quality, short lead times, and personalized customer service!